Method for manufacturing boxes of sheet metal



- W v w a 1V! X SING "WALD, F ZUCKELHAUSEN, NEAR LEIPZIG, GERMANY.

Application filed March 23 T 0 all whom it may concern:

Be it known that 1, MAX Srnonwnrn, a

citizen of the German Republic, residing at Zuclreinausen, near Leipzig.Germs. have invented certain new and use ul 1 grovements in lalethodsfor l/lannitacturing B xes of Sheet Metal, of which the following is aspecification.

fit the manuit' cturing it metal much 'aste is cause l by the tact thatthe sheet m tal is 51 if d :-4i7;1i1(l;11? i plat-es of d mined s hisWaste can be avoided if the box or parts of the san is made in thelollowing manner:

A. plate of sheet metal or waste sheet metal is cut into comparativelynarrow strips so that there is no waste. Each of these strips isprovided with at least wo grooves.

In order that this invention may be clearly understood, 1 shall proceedto deszribe the same with reference to the accompanying drawing, whereinFig. 1 shows the strip of sheet metal in plan 'view.

boxes oi sheet Fig. 2 is a cross section of 1.

F 3 shows in elevation the strip of sheet metal at the second stage ofmanufacture.

Fig. l is a cross section of Fig. 3.

Fig. 5 shows a frame composed of such strips of sheet metal.

Fig. 6 shows at the right hand side in elevation and at the left handside in section a box of sheet metal with contents.

Referring to Figs. 1 and 2 the strip of? sheet metal comprises threeparts a, b, c, and two grooves a, e, separating these flat parts. Thegrooved sheet metal strips are bent along one of the grooves, forinstance along groove 6.7, in such a manner that the arm a is bent atrig t angles to the arms Z), c (Fins. 3 and 1-). A. sheet metal strip ofthis type possesses increased resistance owing to the groove. Thegrooved and bent strips are then out at a convenient angle Serial No.545,086.

as can be seen from Fig. 3 and joined with other strips, cut at the'sameangle, to form a frame. The several sheet metal strips 7, g, It, e'(Fig. 5) are preferably connected by welding. A plate 7: of sheet metalis fixed in this frame (preferably by welding). T he article which isthus produced "forms lid or a bottom for a box, the bent oil arm a.serving as rim. The lid or bottom part ol the box thus constructedensures a great resistance of the box.

Sheet metal boxes oi this type can be used for instance as protectingboxes for the transport of piles of sheet metal plates. Pilesolt' forinstance 112 tin plates of 530 by 760 mm, have a weight of to 100kilograms and they have been packed hitherto in wooden boxes. As attheunloading the boxes cannot be put down very softly but are thrown downby the cannon the wooden boxes split and splinter so that they cannot beused a second time. Fig. 6 shows a box of sheet metal designed for thetransport of tin plates which is capable to withstand very considerablestrain during the transport so that it can be used many times.

I claim An improved method for manufacturing boxes of sheet metalconsisting in cutting narrow strips of sheet metal, in producing atleast two longitudinal grooves in said strips in bending off at rightangles each strip along one of the grooves, in cutting the ends of saidstrips at a desired angle, in joining four strips together by welding inorder to form a frame and in covering said frame by a plate of sheetmetal fixed by welding. I

In testimony whereof I my signature in presence of two witnesses.

MAX SINGEVVALD.

Witnesses:

RUDOLPH. FRIOKE, h IARGARET MENZEL.

